Mouthpiece



H. GIPAPE.

MOUTHPIECE.

APPLICATION mzu sen. n. 1919.

INVENTOR UNITED STATES,

HERMAN G. PAPE, OF YORK, N. Y.

MOUTHPIECE.

Application filed September 11, 1319, SerialNo. 323,125.

To all whom it may concern:

Be it known that I, IIERMAN Go. PAPE, a citizen oi. thellnited States. and resident of New rm-r, in the county of New York and State oi? New York, have'invented certain new and usei'ul Improvements tor Mouthpieces, oi which the Following is a specification. i

This invention relates to improvements in mouthpieces tor sound transmitting and amilogous appliances.

The objects ofthis invention are natural and undistortei'l wave transmission, maximum results of etiiciency, privacy, hygiene, a 'lvertising, and simplicity of manufacture.

By an examination or the accompanying drawing in connection with the following spe :iiication, it will be readily seen, that the variousfeatures describedcontribute to the general and combined objects aforesaid.

'lfiigure transmitter and allied parts'niade in accord ance with the invention. p

Figure 2 is a partial longitudinal sectional and elevational view of the same, drawn to an enlarged scale. i

Figure is a itragmentary sectional View showing a modification in'construction.

Figure t is a front elevational view of the mouthpiece and disc.

Figure 5 is a tra-gmentary plan view oi: the disc indetail.

The mouthpiece 2 is fastened by screw threads at its base into the casing 1. The wall oi. this portion ot the mouthpiece is provided between its threads or exterior suriaceand'its interior or sound concentrating surface with an annular exhaust recess or cavity12 meeting with the exhaust vents 13. Through provision of this recess, the rear sound concentrating portion of the mouthpiece constitutes really an interior wall. This wall is extended beyond the threaded portion and within closest possible prox unity to the diaphragm, say within .020"

to .025", which 'inalzes for most intense concentration of the waves against the diaphragm possible. in indicates the central sound chamber of'the instrument,

rom which the waves are conducted by means of the exhaust vents after having passed through the concentrating chamber of the mouthpiece.

To protect the 1 is a side elevational view of a I in Figs.

diaphram '4. and microphone element 10,1provide acentral, preferably spherical insert piece orprotector 15 having opposed lateral supports 16 that are rigidly affixed or sprung into the cavities 17. These cavities, as shown in Fig. 3,.n1ay be constituted by making direct through passageways or some otthe vents 13 from the exterior of the mouthpiece to the interior of the sound concentrating chamber;

The mouthpiece is preferably made of molded material, which when pre-heated alter molding, will readily yield sufiiciently for the springing into the cavities 17 of the insert piece extensions 16, when, after cooling, it is practically impossible to remove this part again. 1 do not wish to liinitniyselt to any specific metho'dot' afiiring or holding the said ball insert piece 15 within the mouthpiece, since numerous other methods may be resorted to.

I prefer the insert piece 15 as fully shown 2 and l oi the drawing rather than the fixed conical guard 15 as shown in Fig. 8 because it is rev'oluble and will thuspen mit of ready all around cleaning Without the removal of "the mouthpiece for that purpose. Thus I have not only constructed a mouthpiece that is webless and of durable and simple construction, butalso one that has an extremely low internal resistance to sound waves, and makes possible for finest articulate results by way ot'the very small outlet at let of the main chamber and the very close relation of thepart 14 to the diaphragm of: the instrument.

Thus the user of this mouthpiece may secure splendid results with the use of but a very mild voice, owing to the features above described,and disturbance or annoyance to others is greatly avoided and greatest possibleprivacy is the result of the user.

To the rear of" theexhaust vents 13 the usual shoulder 19 meets with the transmitter trontpieee 1. In front of the exhaust vents 13 however, I have providedan extra shoulder 19 thatmeets with the cupped or saucer shapedprivacy. or advertising disc 1.8 that abuts with its rear edge against the transmitter front piece 1 near or at itspe- The disc 1.8 may be made up of any suitable material and in any manner desired. it may contain, besides the service number of the line, any other inscribed or embossed advertising matter. It may be made to constitute a calendar, or any other information may be contained thereon. There always has been real need for such provision or means, free from all service interfering and demoralizing nature. In this direction, the means thus far provided, have, to the best of my knowledge very much failed their purpose.

It will be distinctly noted, that the location of my mulller, its method of use, its close alinement with the transmitter front, its exceedingly shallow construction and rather Hat and wide instead of long shape, and its manner of subdued acoustical exhaust after the waves that have entered the funnel from the speakers month have first impinged upon the diaphragm, set forth distinct advancements .in the art over previous methods employed and set forth for instance in the patents to Kracker, l Voodward, Kintner and Bellows, bearing numbers 901,108; M6245; 938,060 and 1,248,998 respectively. Not only have I avoided forward extension oi. the apparatus, but I have really provided a more complete and standard equipment over these devices that were only attach ments to present equipment in use.

From the capacity chamber 20 the sound waves are finally emitted through the exhaust vents 21, located in the peripheral portion of the disc 18. These vents are of a number or capacity that is less than that of the vents it (or their capacity), located in the mouthpiece, which makes for best mutfling of the .[inally emitted waves and consequent privacy, without the necessary introduction of a lot of chambers within the disc 18 or its formed chamber 20.

in operation: Incoming sound waves, des ignated by the arrows X X entering the mouthpiece, are concentrated. in their passage and caused to pass the protector 15. They then pass through the smallest portion of the concentrating chamber of the mouthpiece at M and impinge against the diaphragm a of the instrument. The waves, after impinging upon the diapl'iragm 4i pass around the extension 14 of the mouthpiece and enter the groove or recess 12. After entering the recess 12, they pass through the mouth piece exhaust vents 13 into the capacity or muliling chamber 20 of the disc 18, whence they are emitted in subdued and indistinct manner out of the exhaust vents 21 into the outer air.

I wish therefore to be distinctly under stood, that the important instrumentalities, fundamental parts, features of my invention, or their arrangement and. orgaiiization, may be materially varied without departing from the Fundamental spirit disclosed and will still come within the scope of my claims hereinafter presented.

lVhat I claim as new and desire to secure by Letters Patent of the United States is l. A month piece of the concentrator class described, said mouthpiece having a substantially heavy wall and being provided on the exterior of its smaller end with a screw thread, a trumpet shaped main sound. pas-- sageway, there being a cavity located entirely within the base of said wall between said thread and the main sound passageway concentric therewith and having radial. exterior exhaust openings meeting with the cavity.

2. A concentrator mouthpiece comprising a diaphragm, said mouthpiece being pro vided. with a solid and substantially heavy wall having exterior screw threads at its base, said. mouthpiece containing a trumpet shaped main sound passageway whose surrounding wall extends Within closest possi ble S JIUXlIIIlt V to the diaphragm. oi' the instrume-nt, in the base of said wall and between. said threads and the main sound passageway being a cavity that is met by terior means of exhaust.

3. A mouth piece of the concentrator class described comprising a constantly convex conical main sound passageway terminating in a single outlet of relatively small diameter, a globular protector rotatably mounted within the same, and radial means of dissipation in co-operative relation with said main sound passageway located entirely at the outlet end.

4. A mouthpiece of the sound concen trator class described comprising anv intake end and an outlet end, conical main sound passageway, a globular protector located at the small end of said main sound passageway, radial dissipating means at said small end of said main sound passageway, clear oil? the walls thcreo-ilt, said. dissipating means being in connection with said main sound passageway, said main sound passageway being whole at its outlet and intake ends and split at a point intermediary of said ends.

A month piece of the concentrator class described for use with a phonetic instrument comprising a wall, a diaphragm behind said wall, a central sound chamber between said wall. and said diaphragm, said mouthpiece having a substantially heavy wall surroumb ing the main sound passageway, said main sound passageway leading into the central sound chamber, a cavity disposed wholly within the base portion of said wall. in substantially parallel relation to the axis of the main sound passageway and connecting with the central sound chamber, and. one or more exhaust vents meeting with the cavity.

6. A hollow concave muliier designed for a constantly convex 'l. o o

use with a mouthpiece of the concentrator class described having a means of exhaust at its base portion, said muffler being for location over said means of exhaust.

7. A hollow mulller for use around a mouthpiece of the funnel-form described provided with exhause vents at or near its base or small end, a central opening in said muliler for said mouthpiece, and final exhaust means for said muffler.

8. In association with a muffler having a central opening for the reception of a mouthpiece, a mouthpiece provided with special means for the locating or positioning of said muffler, said mouthpiece having one or more exhaust vents located wholly within the body of said handler, and one or more exhaust vents in communication with the outer air.

9. In association with a phonetic instrument comprising a diaphgram, a Wall, a central sound chamber between said dia phragm and alining said wall, a mouthpiece fixed to said wall, said mufiler having a central opening for said mouthpiece, a main sound passageway through said mouthpiece leading into said central sound chamber, said muliler being substantially for the purpose of mufliing exhausted sounds from said central sound chamber after they have passed through the main sound passageway of said mouthpiece into said central sound chamber.

10. in association with a mouthpiece of the funnel-form described, a wall oi a phonetic instrument, a diaphragm within said. instrument, a central sound chamber between said wall and diaphragm, a perforated shalwall, a hollow muliler closely low disc of cup-shaped construction forming a muffler with said wall, a central opening for the reception of said mouthpiece, and means for conducting deflected sound waves from the central sound chamber.

11. A mouthpiece of the sound concentrator class described comprising an in take and an outlet end, and having a main webless bore or passageway of constantly tapering formation, a substantially heavy wall sur rounding the main bore having a conical exterior, mounting means at the exterior of said outlet end, exhaust vents located wholly within the wall of said outlet end, the exhaust vents being in co-operative relation with the air on the exterior 01 said mouthpiece whole at said intake end and said outlet end and split in two between said ends.

'12. A concentrator mouthpiece oi the class described, said mouthpiece having a substantially heavy wall and being provided with a fastening means on its exterior for engaging with another device, a trumpet shaped main sound passageway, there being a cavity located entirely within the base of said wall between the fastening means and the main sound passageway, and having a radial exterior exhaust opening meeting with the cavity.

Signed at New York, in the county of blew York and State of New York this 9th day oi September, A. D. 1919.

- HERMAN (l. PAPE. WVitnesses 1 JOHN MAHUKEN, MARY KLEIN.

through the main bore, the bore being" 

